Floor-set



1 (No Model.) i N. B. MARSTON.

FLOOR SET.

No. 460,790. Patented 0013.6,1891.

a III/Il WWW I 1 5 1W UNITED STATES PATENT OFFICE.

NATHANIEL l3. MARSTON, OF LEBANON, NEW HAMPSHIRE.

FLOOR-SET.

SPECIFICATION forming part of Letters Patent No. 460,790, dated October 6, 1891.

Application filed May 18, 1891.

Z '0 all whom it may concern:

Be it known that I, NATHANIEL B. MARSTON, of Lebanon, in the county of Grafton and State of New Hampshire, have invented a new and useful Improvement in Floor-Sets, which improvement is fully set forth in the following specification and accompanying drawings, in which Figure I is a side elevation of my improved floor-set in operative position, and Fig. II asectional View of the same. I

My invention relates to improvements in clamping devices, more particularly that class known as floor-sets, and its object is to provide a simple, efiective, and easily-applied device whereby flooring-boards or other j oiners work may be quickly and firmly compressed and held in position until permanently secured.

Referring to the accompanying drawings, A designatesthe frame of the machine, which may be made ofcast or wrought metal, having on its under side near the front end aseries of spurs a, and on the rear end a swinging pawl or dog 0., pivoted at a. The sides of the frame are vertically enlarged and provided with slots B. A sliding bar 1) moves longitudinally within the frame and has a head Z) pivoted thereon. Lugs b are attached to the sides of the sliding bar and engage pivots C on the short arm of a lever c. The lever is provided with a pin 0, which operates as a fulcrum, moving up or down in the slots B whenever the lever is raised or \Vhen the flooring-boards are comlowered.

Serial No. 393,198- (No model.)

pressed, the lever is stopped in the desired position by a stud D, which engages a ratch (Z, pivoted between the sides of the frame.

The operation of the device will be readily understood. The machine is placed upon a joist or other timber, with the head of the slidin g bar in contact with the flooring and having the lever in a perpendicular position. The swinging dog and spurs are pressed into the joist by the foot of the workman or bya mallet. The head of the sliding bar, being laterally enlarged and free to move on its pivot, adjusts itself evenly to the edge of the board, which thus escapes injury when the pressure is applied. \Vhen the boards are properly fastened, the clamp is released by simply reversing the lever.

\Vhat I claim as new is- In a floor set or clamp, the combination of a stationary frame provided underneath with retaining-spurs and a swinging pawl and having vertically-slotted sides, and an actuating-lever provided with a fulcrum adapted to move in said slots, with a sliding bar pivotally attached to said lever and having an enlarged self-adj usting head, and a ratch for retaining said lever, substantially as and for the purpose herein set forth.

In testimony that I claim the foregoing I have hereunto set my hand, this 13th day of May, 1891, in the presence of witnesses.

NATHANIEL b. MARSTON.

Witnesses:

W. A. CHURCHILL, CHARLES A. Downs. 

